JPS62178069A - Facsimile recording system - Google Patents

Abstract

PURPOSE:To smoothly join pictures and record a picture of high quality having reproducibility by synthesizing individual degrees of influence and setting the picture element level of each picture element of a pseudo mains canning line based on the synthesized value. CONSTITUTION:When address information F is outputted, recorded data stored in a storage area, which is designated by this information of a ROM 30 is outputted as a picture signal. If a mainline A1 is designated, the same data as data shifted to the d-th bit of a shift register 21 is outputted as the picture signal. If a pseudo line B1 is designated, the signal of a black picture element is outputted when the d-th bit of the shift register 21 is in the high level and any of bits a'-q' goes to the high level. Consequently, picture elements of pseudo lines B1-B3 are always set to optimum levels in accordance with the combination of picture signals of two mainlines A1 and A2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a facsimile recording method in which received image information is recorded by inserting a pseudo main scanning line between two adjacent main scanning lines.

[Technical background of the invention and its problems]

In facsimile machines that can record received image information at a higher main scanning line density than the main scanning line density, generally the received image information is A pseudo main scanning line is created and inserted between each main scanning line to perform recording scanning. However, in this type of conventional recording method, for example, as shown in FIGS. 3(a) and 3(b), each main scanning line A1. The image data of pseudo main scanning lines B1 to B3 (three lines in the figure) inserted between A2 are set and recorded to be the same as the data of the upper main scanning line A1.

Therefore, if there is no or very small change in the image data between each main scanning line of the received image signal, there is no problem, but if the change is large, the difference between the pseudo main scanning line and the lower main scanning line The connection between pixels becomes awkward,
As a result, the reproducibility of recorded images deteriorates.

[Purpose of the invention]

The present invention provides a facsimile recording method that smooths the connection of the image (3) between the main scanning line and the pseudo main scanning line of the received image information, thereby making it possible to record high-quality images with reproducibility. The purpose is to

[Summary of the invention]

In order to achieve the above object, the present invention provides a pixel at a specific level of the main scanning line for each pixel of a pseudo main scanning line inserted between two adjacent main scanning lines of received image information. The degree of influence of the above-mentioned specific level pixel is assigned according to the distance from The pixel level of each pixel in the main scanning line is set.

[Embodiments of the invention]

A facsimile recording system according to an embodiment of the present invention will be described below with reference to the drawings. In this embodiment, there are three pseudo main scanning lines (hereinafter referred to as pseudo lines) 8 between main scanning lines (hereinafter referred to as main lines) of received image information > A1 and A2.
The case where 1 to B3 are inserted will be explained as an example.

In this recording method, first, the main line A1. For each pixel of each pseudo line 81 to B3 inserted between each pixel of the main line A1. The degree of influence is assigned according to the distance from the black pixel of A2. For example, this line A1. If the image data of A2 is as shown in FIG. 3(a), among the pixels of each of the pseudo lines 81 to B3, the pixels directly in contact with the black pixels of the upper main line A1 are 1st
As shown in Figure <a>, the degree of influence due to the black pixel is ``3'', and the pixels that are adjacent to each other with one pixel apart are given the degree of influence ``2'' due to the black pixel, and the pixels are further separated by two pixels and are in contact with each other. The pixel is given a degree of influence of "1" by the black pixel. Similarly, the pixels directly in contact with the black pixel of the lower main line A2 are given an influence level of "3" as shown in Figure 1 (b), and the pixels that are in contact with the black pixel across from them are given an influence degree of 11211. Furthermore, an influence level of "1" is assigned to pixels that are separated by two pixels and are in contact with each other.

After finishing assigning the degree of influence to each pixel of the pseudo lines 81 to B3, next, the above-mentioned main lines A1 . The sum of each degree of influence added by A2 is calculated, and from this result, pixels with a sum of influence degrees of ``4'' or more are identified in Figure 1 (C
).

Then, each selected pixel is set as a black pixel, and all remaining pixels are set as white pixels. However, among the pixels defined as black pixels, for example, as shown in FIG. 1(C), a pixel for which no black pixel exists in the upper and lower lines is defined as a white pixel. Thus, the book A1. The creation of each of the pseudo lines 81 to B3 inserted between A2 is completed.

The image data of the pseudo lines B1 to B3 created in this way are converted to the main line A1. If it is recorded together with the image data of A2, the recorded result will be the main line A1. There is less awkwardness at the contact point between A2 and the pseudo lines 81 to B3, and as a result, the reproducibility is almost the same as when image information with high main scanning line density is transmitted from the transmitting side and recorded and scanned as it is. High quality recorded images can be obtained.

FIG. 2 shows the configuration of a recording data creation circuit that implements the facsimile recording method of the above embodiment. This circuit includes line memories 11.12 that store image data of two adjacent main scanning lines (main lines) AI and A2 of received image information, and these line memories 11.12.
7-bit shift registers 21 and 22 for serially shifting and inputting one line of image data output from each in synchronization with the output GK, and a ROM for creating recording data.
30, and an address generating circuit 40 which performs an OR operation on the parallel outputs of the respective shift registers 21 and 22 between predetermined bits and then supplies the output to the ROM 30 as address information (8 bits). Note that this address creation circuit 40 is configured to handle the lines of recording data created by the ROM 30, that is, the main line A1 and the pseudo lines 81 to B.
Information (2 bits) F for specifying either one of the addresses 3 and 3 is also supplied to the ROM 30 as part of the address information.

By the way, the ROM 30 stores predetermined record data corresponding to a total of 10 bits of address information output from the address generation circuit 40, and the ROM 30 stores the data specified by this information when the address information is output. The recorded data stored in the stored storage area is output as an image signal.

For example, when the main line A1 is specified by the address information F, the same image data as the data shifted to the d-th bit of the shift register 21 is output as an image signal. On the other hand, if the pseudo line B1 is specified by the address information F, for example, the d bit of the shift register 21 is
'' level and when any one of the a' to Q' bits of the shift register 22 reaches the ``H'' level, a black pixel signal is output.Similarly, the ROM 30 specifies this pseudo line B1. In the case of other combinations of image signals in the state where the pseudo line B is
2. Even if B3 is specified, shift register 21.2
For all combinations of image signals of each bit of 2, corresponding black and white image signals are outputted according to output image data set in advance.

Therefore, each pixel level of the pseudo lines 81 to B3 is
Two main lines A1. The optimum level is always set according to the combination of A2 image signals, and as a result, the recorded image has good reproducibility and is of high quality. Also,
The circuit of this embodiment basically includes a ROM 30 as a data table and two shift registers 21 and 22.
Since it can be constructed by simply providing the following, it has the advantage of being extremely easy to implement.

Note that the present invention is not limited to the above embodiments. For example, in the above embodiment, three pseudo lines are inserted between main lines, but two pseudo lines are inserted between main lines.
The same application is possible even when a book or one book is inserted. Further, in order to accommodate all of these numbers of pseudo lines, recording data creation circuits may be provided for each number of pseudo lines, and these circuits may be switched and used by a selector as necessary. Furthermore, in the above embodiment,
The influence of the black pixels of the main line is attached to each pseudo line, but for a received image that has more white pixels, such as an image treated as white, the influence of the white pixels of the main line is attached. You can do it like this. In addition, there are methods for assigning influence degrees to each pixel of a pseudo line, influence degree weights, influence degree synthesis means (products may be taken in addition to sums), and means for determining pixel signal levels from influence degree composite values. etc., can be implemented with various modifications without departing from the gist of the present invention.

(Effects of the Invention) As described in detail above, according to the present invention, for every two adjacent main scanning lines of received image information, the main scanning line is The degree of influence by the above-mentioned specific level pixel is assigned according to the distance from the pixel at the specific level of By setting the pixel level of each pixel of the pseudo main scanning line based on the above, the connection between the main scanning line and the pseudo main scanning line of the received image information is smoothed, and this improves reproducibility. It is possible to provide a facsimile recording system that can perform certain high quality image recordings.

[Brief explanation of drawings]

FIGS. 1(a) to (d) and FIG. 2 are for explaining the facsimile recording method in one embodiment of the present invention, and FIGS. 1(a) to (d) respectively show pseudo main scanning lines. A schematic diagram for explaining the recording data setting method for each pixel, Figure 2 is a diagram showing the configuration of a recording data creation circuit for implementing the same recording method, and Figures 3 (a) and (b) are conventional FIG. 2 is a schematic diagram for explaining a facsimile recording method. A1. A2... Main scanning line of received image information (main line), B1 to B3... Pseudo main scanning line (pseudo line)
, 11.12... line memory, 21.22... shift register, 30... ROM for creating recording data,
40...Address creation circuit, F...Address information for specifying line, CK...Clock.

Claims (1)

[Claims] In a facsimile recording method in which at least one pseudo main scanning line is inserted and recorded between two adjacent main scanning lines of received image information, a pseudo main scanning line inserted between each of the two main scanning lines is recorded. The degree of influence of the specific level pixel is assigned to each pixel of the scanning line according to the distance from the pixel of the specific level of the main scanning line, and each of the degrees of influence assigned to each of these main scanning lines is used as a pseudo main scan. A facsimile recording method characterized in that each pixel of the line is combined and the pixel level of each pixel of the pseudo main scanning line is set based on the combined value.